Copper compounds of leucotriarylmethanazo dyestuffs and a process of making same.



UNITED STATES P omen.

FRITZ FUNOKE AND CARL JAGERSPACHER, OF IBASE L, SWITZERLAND, ASSIGNORS TO SOCIETY OF CHEMICAL INDUSTRY EAGLE, OF BASEL,' SWITZERLAND;

COPPER COMPOUNDS OF LEUCO'IRIARYLMETHANAZO DYES'I'UFFS AND A PROCESS OI MAKING SAME.

No Drawing.

To all whom it may concern:

Be it known, that we, FRITZ FUNGKE and.

per oxid, copper hydroxid, in an aqueous medium into new technically valuable copper compoundssoluble in water and dyeing animal fibers in an acid bath vivid blue to green tints fast to light, washing and alkali. The new copper compounds constitute blue to blue and green powders, soluble in Water with blue to green coloration and inconcenadded, at-about 80 C., a solution of 13 parts with green to red color amidoleucopatentblue with betana'phthol are dissolved in 1000 parts tepid Water and to the obtained solution is added at 70 C. a

solution of 13 parts of crystallized copper sulfate in 50 parts Water, whereby the greenblue coloration of thesolution turns to blue. The resulting-copper compound is precipitated by addition of common salt, isolated by filtration, pressed and dried. It consti-- tutes a blue-black powder, soluble in water with blue and in concentrated sulfuric acid with green coloration. The new copper compound dyes'animal fibers in an acid bath blue pure tints very fast to light and to washing. 1

Example 2: 37 parts of the dyestufl' obtained by combining the diazo derivative of amidoleucopatentblue with 1-phenyl3- methyl-5-pyrazo1one are dissolved in 1000 parts water and to the obtained solution is I Specification of Letters Patent. Patented Au 14 1917. Application filed January 5,1911. Serial No. 140,689.

copper sulfate in 50 parts water, whereby the green-yellow coloration of the solution turns to pure green and the new copper compound is simultaneously precipitated. It is isolated by filtration, pressed and dried. It constitutes a black-green powder, dissolving 1n water to a pure green and in concen trated sulfuric acid to an orange-red solut1on. It dyes animal fibers in an acid bath pure green tints fast to washing and to light.

Example 3: parts of the dyestufi obtained by combining the diazo derivative of amidoleucopatentblue with acetoacetanilid are dissolved in 800 parts water at 80 C. and to this solution is added a solution of 13 parts copper sulfate in parts water, whereby the yellow-green coloration of the solution turns to green whilethe formed copper compound is precipitated simultaneously. By addition of common salt the pre cipit'ation of the new copper compound is completed and thislatter is afterward isolated by filtering, pressing and ry ng. It constitutes a blue-black powder dissolving in water to green and in concentrated sulfuric acid to brown-red solutions.

It dyes animal-fibers in an acid bath very pure green tints of an excellent fastness 'to light and to washing. v

What we claim is:

1. ,The herein described process for ,th

manufacture of copper compounds of leucotri'arylmethanazo, dyestuifs, soluble in water, consisting in treating an azo dyestufi derived from a diazo derivative of amidooxyleucotriarylmethan derivatives with a copper compound in an aqueous medium.

2. As new products the herein described 0 copper compounds of leucotriarylmethanazo dyestuffs, constituting black to blue and greenpowders, soluble in water with blue to" blueto green tints fast to washing and to light. y

3.} As a new articleof manufacture, the

herein described copper compound of thedyestufi derived from the d'iazo derivative of leucoamidopatentblue and 1-phenyl-3-methyl- 5- pyrazolo'ne, which constitutes .a blackgreen powder soluble in water to a pure 1916, in the-presence of two subscribing witgreen solution and in concentrated sulfuric nesses.

acid to orange-red solutions and dyes animal DR. FRITZ FUN CKE. fibers in an acid bath pure green tints fast to DB. CARL AGERSPACHER. v 5 washing and to light. Witnesses:

In witness whereof we have hereunto LYDIA UEBELE,

I signed our names this 18th day of December AMAND RI'ITER. 

